28993513999 has 4 divisors (see below), whose sum is σ = 30519488440. Its totient is φ = 27467539560.

The previous prime is 28993513979. The next prime is 28993514003. The reversal of 28993513999 is 99931539982.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 28993513999 - 2²³ = 28985125391 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28993513979) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 762987192 + ... + 762987229.

It is an arithmetic number, because the mean of its divisors is an integer number (7629872110).

Almost surely, 2^28993513999 is an apocalyptic number.

28993513999 is a deficient number, since it is larger than the sum of its proper divisors (1525974441).

28993513999 is a wasteful number, since it uses less digits than its factorization.

28993513999 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1525974440.

The product of its digits is 42515280, while the sum is 67.

The spelling of 28993513999 in words is "twenty-eight billion, nine hundred ninety-three million, five hundred thirteen thousand, nine hundred ninety-nine".